A robust uniaxial force sensor for minimally invasive surgery.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 20172798.
- Also identified by DOI 10.1109/TBME.2009.2039570 and PMC identifier 2910788.
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Abstract
This paper presents a novel miniature uniaxial force sensor for use within a beating heart during mitral valve annuloplasty. The sensor measures 5.5 mm in diameter and 12 mm in length and provides a hollow core to pass instrumentation. A soft elastomer flexure design maintains a waterproof seal. Fiber optic transduction eliminates electrical circuitry within the heart, and acetal components minimize ultrasound-imaging artifacts. Calibration uses a nonlinear viscoelastic method, and in vitro tests demonstrate a 0-4-N force range with rms errors of 0.13 N (< 3.2%). In vivo tests provide the first endocardial measurements of tissue-minimally invasive surgery instrument interaction forces in a beating heart.
Medical subject headings
- Cardiac Valve Annuloplasty
- Minimally Invasive Surgical Procedures
- Transducers, Pressure